Turret-lathe having a supplemental drill-spindle



(No Model.) 2 Sheets-Sheet 1.

J HARTNESS TURRET LATHE HAVING A SUPPLEMENTAL DRILL SPINDLE; No.409,786.

Patented Aug. 27, 1889.

(No Model.) 2 Sheets-Sheet 2.

J. HARTNESS. TURRET LATHE HAVING A SUPPLEMENTAL DRILL SPINDLE. No.409,786.

Patented Aug. 27, 1889.

N, PEYERS, Pholo-Lllhngmplwr, wmin wn, 1:. cu

UNITED STATES PATE T OFFICE.

JAMES HARTNESS, OF TORRINGTON, CONNECTICUT.

.TURRET-LATHE HAVING A SUPPLEMENTAL DRILL-SPINDLE.

SPECIFICATION forming part of Letters Fate-1t No. 409,786, dated'Aug'ust2'7, 1889. Applica i n fi December 7, 1888. Serial No. 292,951. (Nomodel.)

To all whom it may concern:

Be it known that 1, JAMES HARTNESS, a citizen of the United States,residing at Torrington, in the county of Litchfield and State ofConnecticut, have invented an Improvement in Turret-I-Iead Lathes, ofwhich the following is a specification.

The invention is primarily intended for that form of turret-head lathescommonly called hand-screw machines, and for the purpose of making aroll with a hole drilled in each end, although it can be used with otherturret-head lathes and for other work, as will hereinafter appear.

The object of this invention is to provide means for drilling orthreading the second end of the work without rechucking it or handlingit the second time. This object I attain by the mechanism illustrated inthe ac companying drawings, in which Figure 1 is a plan of a handturret-1athe with the improvement attached thereto. Fig. 2 is a frontelevation of the same. Fig. 3 is a sectional view 011 line w a: of Fig.2, with b and c, Fig. 1, removed. Fig. 4 is a vertical section of A online y y and of B on line 2 .2, Fig. 3. Fig. 5 is an end view of A,Figs.3 and 4. Fig. (3 is a sectional view of roll as made by thisinvention.

The operation of making the rolls is as follows: Referring to Fig. 1,the turretf revolves one'sixth of a revolution at each backward motionof slide 6 in the usual manner. The direction in which the turretrevolves and the backward motion of slide are indicated by the arrows uand 1), respectively. The roll is cut from rod of wire a, which isrevolved by chuck S, as usual but instead of it dropping when severedfrom the rod it is held by the turret-chuck A, which, when the turretturns to its next position, carries said roll in line with auxiliaryspindle O to be drilled by the next forward motion of the slide a, andwhile this roll is having its second hole drilled by the auxiliaryspindle O the next roll is having its first hole drilled by turret-drillc, the first hole being drilled before the roll is cut from the rod. Thenext backward motion of slide e turns the turret-chuck past theexpelling-block B on cam B, where the roll is ejected from the chuck.The turret-chuck is pivotally supported by the frame A, Fig. 4.

Said frame is provided with a shank, by which it is held in theturret-head f of Figs. 1 and 2 in the usual manner. The clamping-screw Eis held rigidly to frame A by nuts 10 and Z, and the lower part of saidscrew enters a threaded hole in chuck D, Fig. 4, allowing the end tobear against the split bushing ,m, which holds the work. To open andclose said bushing on the work, the chuck D is turned on the screw E,and to cause it to turn the requisite amount a fixed face cam B, Fig. 3,is attached to the slide 6, Fig. 1. This cam controls the position ofroller i, Figs. 4 and 5, which is attached to the arm of the chuck.Referring to Fig. 3, it will be seen that in the first position the armD of chuck D is close to the turret-head f. The chuck is now open toreceive the work as it is being cut from the rod. The next backwardmotion of the slide e turns the turret-head f one-sixth of a revolutionand brings the chuck to the position indicated by dotted lines D. Atthis po-.

sition the arm D is held out from the turrethead f, and was forced tothis position by fixed cam B while the turret-head was turning. Thus thework is clamped and held rigidly to be operated upon by the tool carriedby the auxiliary spindle O at the next forward motion of slide 6. Thenext backward motion of said slide turns the turret to and a trifle pastthe position indicated by dotted lines D'. Coming to this posit-ion thecam B has forced the chuck-arm D to return to its first position closeto the turrethead f, thus relieving the pressure of clampin g-screw E onthe work to allow the expelling device to eject said work.

The expelling device is composed of three principal parts-the lever F,the plunger 0, and the stud p of Figs. 3, 4, and 5. The plunger isattached to the lever and the lever to the chuck D, Fig. 4, byscrews,which allow a free pivotal motion. The stud p is attached to the middleof the lever and extends downward just far enough to come in contactwith that part of the cam B which is marked B, Figs. 3 and 4. Then thechuck is passing this part of the cam the studs motion is retarded, andit causes 1ever F, Fig. 3, to push plunger 0 into chamber in bushing m,which holds the work, thereby expelling said work. A drill-guide q isattached to the frame A, Figs. 3 and 5. The auxiliary spindle C, Fig. 1,is shown with a drill-chuck and drill. These can be removed and athreading-die attached when it is desired to thread instead of drillingthe second end of the work, or a slotting-saw attached for slottingscrewheads and similar work. When used. for slotting, the auxiliaryspindle must be held at a line perpendicular to instead of parallel withthe axis of main spindle. The auxiliary spindle O is preferably drivenby a round belt from a counter-shaft above the machine.

I claim as my invention- 1. In a turret-head machine having an auxiliaryspindle carrying a tool, the combination of a chuck attached to theturret for the purpose of taking the work cut from the rod of stock heldin the main spindle to the said auxiliary spindle, there to be operatedupon by the tool held in the saidauxiliary spindle,

the said chuck being pivoted on the clamping-screw E, which is securedto the turret by frame A, with a non-revolving cam B, by which the saidpivoted chuck is caused to turn 011 its pivot when the said turretturns, substantially as shown and described.

2. In a turret-head lathe or machine, a chuck D, held by frame A,attached to the turrethead f, combined with cam B, for the purpose shownand set forth.

3. In a turret-head lathe, the combination of a frame A, clamping-screwE, chuck D, lever F, plunger 0, and stud p, with cam B and auxiliaryspindle O, substantially as shown and described.

' JAMES I-IAR'INESS. Witnesses:

JOHN W. BROOKS, JOHN N. BRooKs.

